A high-speed latch includes a latch unit and a first current source. A material is inserted within the etched portion of the 180 degree phase shift channel of a reticle, wherein the material contains an index of refraction such that the first order light is propagated through the 180 degree channel. A substitute product for the determined product is selected. In operation, when a high pressure fluid flow occurs at a high pressure input, such valves automatically close the low pressure inputs.